1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
|
/**
* LSP extension — manifest + activate(host).
*
* Builds the manager with real adapters, registers the lsp tool and
* lspServiceHandle, and wires deactivate to manager.shutdownAll().
*/
import { extname, join } from "node:path";
import type { Extension, HostAPI, ServiceHandle } from "@dispatch/kernel";
import { defineService } from "@dispatch/kernel";
import { aggregateDiagnostics } from "./aggregate.js";
import type { SpawnedProcess } from "./client.js";
import { LspManager } from "./manager.js";
import { createLspTool } from "./tool.js";
import type {
DiagnosticsResult,
GetDiagnosticsOpts,
LspServerStatus,
LspService,
} from "./types.js";
export const lspServiceHandle: ServiceHandle<LspService> = defineService<LspService>("lsp");
function realSpawn(
command: string[],
opts: { readonly cwd: string; readonly env?: Readonly<Record<string, string>> | undefined },
): SpawnedProcess {
const env: Record<string, string | undefined> = { ...process.env };
if (opts.env) {
for (const [key, value] of Object.entries(opts.env)) {
env[key] = value;
}
}
const proc = Bun.spawn(command, {
cwd: opts.cwd,
env: env as Record<string, string>,
stdin: "pipe",
stdout: "pipe",
stderr: "pipe",
});
return {
stdin: proc.stdin,
stdout: proc.stdout,
stderr: proc.stderr,
pid: proc.pid,
kill: () => proc.kill(),
// Surface process exit so the client can stop querying a dead server
// and self-heal (respawn). Bun's Subprocess.exited resolves with the
// exit code (or rejects if killed by signal — treat as code:null).
onExit: (handler) => {
(proc as { exited: Promise<number | null> }).exited
.then((code) => handler({ code }))
.catch(() => handler({ code: null }));
},
};
}
/**
* The minimal slice of `node:fs.watch`'s return we depend on — narrow enough
* that a test can supply an EventEmitter stand-in. `on('error', …)` is the
* crucial bit: without a listener, Node/Bun escalates a watcher 'error'
* event (e.g. from `bun install` deleting transient `.old_modules-*` dirs)
* into an uncaught exception that kills the process.
*/
export interface FsWatcherHandle {
readonly on: (event: string, cb: (err: Error) => void) => FsWatcherHandle;
readonly close: () => void;
}
export type WatchFn = (
root: string,
opts: { readonly recursive: boolean },
cb: (eventType: string, filename: string | null) => void,
) => FsWatcherHandle;
function defaultWatch(): WatchFn {
// Loaded lazily so the kernel-style import graph never statically pulls
// `node:fs` (the extension imports it at call time, matching the prior
// `require` form).
const { watch } = require("node:fs") as {
watch: WatchFn;
};
return watch;
}
function realFileWatcher(
root: string,
onEvent: (e: { readonly type: "create" | "change" | "delete"; readonly path: string }) => void,
watch: WatchFn = defaultWatch(),
): { readonly close: () => void } {
const watcher = watch(root, { recursive: true }, (eventType: string, filename: string | null) => {
if (!filename) return;
const fullPath = root.endsWith("/") ? `${root}${filename}` : `${root}/${filename}`;
const type = eventType === "rename" ? "create" : "change";
onEvent({ type, path: fullPath });
});
// Attach a no-op 'error' listener so a transient FS error (e.g. a watched
// directory vanishing mid-`bun install`) is swallowed instead of being
// escalated to an uncaught exception that crashes the server.
watcher.on("error", () => {
// Gracefully ignore transient FS errors — the watcher is best-effort.
});
return { close: () => watcher.close() };
}
function realFs() {
return {
readText: async (path: string) => {
const file = Bun.file(path);
return file.text();
},
exists: async (path: string) => {
const file = Bun.file(path);
return file.exists();
},
};
}
export const extension: Extension = {
manifest: {
id: "lsp",
name: "Language Server Protocol",
version: "0.0.0",
apiVersion: "^0.1.0",
trust: "bundled",
activation: "eager",
capabilities: { spawn: true, fs: true },
contributes: { tools: ["lsp"], services: ["lsp"] },
},
activate(host: HostAPI) {
const logger = host.logger;
const manager = new LspManager({
spawn: realSpawn,
fileWatcher: realFileWatcher,
fs: realFs(),
logger: {
info: (msg, attrs) =>
logger.info(msg, attrs as Record<string, string | number | boolean | null> | undefined),
warn: (msg, attrs) =>
logger.warn(msg, attrs as Record<string, string | number | boolean | null> | undefined),
error: (msg, attrs) => logger.error(msg, attrs as Record<string, unknown> | undefined),
},
});
const lspTool = createLspTool(manager);
host.defineTool(lspTool);
const service: LspService = {
async status(cwd: string): Promise<readonly LspServerStatus[]> {
return manager.status(cwd);
},
async getDiagnostics(opts: GetDiagnosticsOpts): Promise<DiagnosticsResult> {
// 10s hard ceiling per server, regardless of what the caller
// passes (the edit hook still passes 60_000 — clamped here, so
// no other-unit edit is needed). A server that doesn't respond
// in 10s is skipped with a notice instead of waited out.
const PER_SERVER_CAP_MS = 10_000;
const timeoutMs = Math.min(opts.timeoutMs ?? PER_SERVER_CAP_MS, PER_SERVER_CAP_MS);
const fileExt = extname(opts.filePath).toLowerCase();
const absolutePath = opts.filePath.startsWith("/")
? opts.filePath
: join(opts.cwd, opts.filePath);
// Get all connected servers matching this file's extension.
// A dead/corrupted server has state:"error" and is excluded —
// no per-edit hang on a corpse.
const statuses = await manager.status(opts.cwd);
const matching = statuses.filter(
(s) => s.state === "connected" && s.extensions.some((ext) => ext === fileExt),
);
if (matching.length === 0) {
return { formatted: "", slow: false, timedOut: false };
}
const agg = await aggregateDiagnostics(
(id, root) => manager.getClient(id, root),
matching,
absolutePath,
timeoutMs,
{ text: opts.text, minSeverity: opts.minSeverity },
);
return { formatted: agg.formatted, slow: false, timedOut: agg.timedOut };
},
};
host.provideService(lspServiceHandle, service);
host.logger.info("LSP extension activated");
// Store manager for deactivate
(lspManagerStore as { manager: LspManager | null }).manager = manager;
},
deactivate() {
const store = lspManagerStore as { manager: LspManager | null };
store.manager?.shutdownAll();
store.manager = null;
},
};
// Module-scoped store for deactivate
const lspManagerStore: { manager: LspManager | null } = { manager: null };
/**
* Test-only re-export of the production `realFileWatcher` adapter, so the
* fs.watch error-listener behavior (Bug 2) can be exercised with an injected
* fake watcher without poking module internals. NOT part of the public
* extension surface — the `__test__` prefix signals test-only use.
*/
export const __test__realFileWatcher = realFileWatcher;
|
